What if the URL ends in a slash, with no filename?
In this case, the web server will try to find an index file for the specified folder. For most web servers, including ours, the default index files name is “index.html”, though many (again, including ours) are moving to the PHP language, so their index files will be named index.php. If you go to http://www.wou.edu/ucs/ you will see that it is the same as http://www.wou.edu/ucs/index.html. It is a good idea to name the main page in a folder “index.html” because it makes it easy to find. If there is no file named “index.html” then our web server will try other names such as “index.php”, “index.htm”, “default.htm”, and a few others; if no file by any of these names is in the folder, the web server will show a list of every file in the folder, including those that you might not have intended the public to see.